Chevy Impala 2001 Clunk in Front End Left Side

impala
noises

#1

About 2 weeks ago every time I back my car out of the parking space and turn the wheel, I hear a loud dull pop/clunk in the front left side of the car. It usually does it once, but may do it 2 times. I brought it to a Chevy Dealer and they replaced the 2 upper motor mounts and lubricated the Intermittant Steering Shaft, so NOW it does it also if I am on an incline and in drive but at a complete stop. When I go it pops again. I can reproduce the problem/noise if I put the car in reverse and put my foot on the break and then give it gas. It pops just once.

I brought it to Sears auto and they said it was transmission spindles. I don?t know what that is but it didn?t sound remotely right.

I then brought it to a Chevy dealer, and they said it was my upper motor mounts and my Intermittent steering shaft. So $300 later I now have new upper engine mounts with new rubber, and a freshly lubed intermittent steering shaft, AND the same problem.

Any idea what is going on. I read online people talking about CV joints, boots, and drive train, transmissions, shafts, aliens. It only happens in the front left side, and I can sometimes make it happen after I park and if I aggressively rock the car front to back.


#2

Ball joint, upper strut mount, improperly seated coil spring, or swaybar bushings and/or end link. A bad ball joint is a safety hazard, so get this checked quickly.


#3

Could be front Sub frame bushing. I think I remember something about shims for the sub frame bushing to stop the noise.


#4

Also having the subframe bolts re torxed to factory specs may stop the noise, but you would think the factory trained tech would have check that.


#5

Thank you to all who replied, and gave suggestions. The Problem is fixed!! I was amazed. It turned out that the 2 small bolts that hold the motor mounts to the frame were stripped, so they never held. Chevy replaced 4 bolts, and no more problem. I wonder if the mounts needed to be replaced to begin with, or if it was the bolts all along, but with 100,000 miles it was probably a good idea anyway.
So, endless diagnostic headache turned out to be $.39 in bolts. Ugh!!


#6

Its alway great to here the outcome.